### Sunflower shrinking

Fork of: Sunflower seed distribution

```// Forked from "Sunflower seed distribution" by Jurgen
// https://turtletoy.net/turtle/1631e17b11

let r = 1.5; //min=.5, max=4, step=.1
let margin = .4; //min=0, max=1, step=.1
let maxR = 90; //min=20, max=150, step=10
let shrinkf = 1.4; //min=0, max=5, step=.1
let maxSR = 16; //min=1, max=20, step=.5
let opacity = .8; //min=.1, max=1, step=.1
let fillCircles = 1; //min=0, max=1, step=1

Canvas.setpenopacity(.5);

const turtle = new Turtle();

var gr = (1+Math.sqrt(5)) / 2;
var grRot = (gr - 1) * 2 * Math.PI;

var circles = [];
var rotation = 0;

function drawCircle(x, y, r) {
for(var i = (fillCircles == 1? 0: r); i <= r; i+=.2) {
turtle.jump(x + i, y);
turtle.circle(i);
}
circles.push([x, y, r]);
}

function hasIntersections(x, y, r) {
for(var i = 0; i < circles.length; i++) {
if(Math.pow(x - circles[i][0], 2) + Math.pow(y - circles[i][1], 2) < Math.pow(r + circles[i][2] + margin, 2)) {
return true;
}
}
return false;
}

function walk(i) {
rotation += grRot;

for(var testR = 0; testR < maxR; testR += 0.1) {
var x = testR * Math.cos(rotation);
var y = testR * Math.sin(rotation);

var useR = Math.min(maxSR, r - (shrinkf * testR / 100))

if(!hasIntersections(x, y, useR, circles)) {
drawCircle(x, y, useR);
return true;
}
}

return false;
}```